session-android/res/layout/preference_divider.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <View
        android:layout_width="match_parent"
        android:layout_height="@dimen/medium_spacing"
        android:background="@color/cell_background" />

</LinearLayout>